Singularity avoidance in quantum gravity
High Energy Physics - Theory
2020-01-22 v3 General Relativity and Quantum Cosmology
Abstract
The purpose of this work is to investigate the consequences of quantum gravity for the singularity problem. We study the higher-derivative terms that invariably appear in any quantum field theoretical model of gravity, handling them both non-perturbatively and perturbatively. In the former case, by computing the contributions of the additional degrees of freedom to a congruence of geodesics, we show that the appearance of singularities is no longer a necessity. In the latter, which corresponds to treating the quantised general relativity as an effective field theory, we generalise the Hawking-Penrose theorems to include one-loop corrections of both massless matter and graviton fluctuations.
Cite
@article{arxiv.1911.05037,
title = {Singularity avoidance in quantum gravity},
author = {Iberê Kuntz and Roberto Casadio},
journal= {arXiv preprint arXiv:1911.05037},
year = {2020}
}